<template>
  <el-container class="home_container">
    <!-- 头部区域 -->
    <el-header>
      <div>
        <img src="../assets/logo.png" />
        <span>电商后台管理系统</span>
      </div>
      <el-button type="info" @click="logout">退出</el-button>
    </el-header>
    <!-- 主体区域 -->
    <el-container>
      <!-- 侧边栏 -->
      <el-aside :width="toggle ? '64px' : '200px'">
        <div class="toggle-button" @click="toggleClick">|||</div>
        <!-- 侧边栏菜单导航 -->
        <!-- unique-opened默认为true，只能打开一个一级菜单 -->
        <el-menu
          background-color="#333744"
          text-color="#fff"
          active-text-color="#409EFF"
          unique-opened
          :collapse="toggle"
          :collapse-transition="false"
          :router="true"
          :default-active="activePath"
        >
          <!-- 一级菜单 -->
          <el-submenu :index="item.id+''" v-for="item in MenuList" :key="item.id">
            <!-- 一级菜单模板 -->
            <template slot="title">
              <!-- 图标 -->
              <i :class="iconObj[item.id]"></i>
              <!-- 文本 -->
              <span>{{item.authName}}</span>
            </template>
            <!-- 二级菜单模板 -->
            <el-menu-item
              :index="'/'+subItem.path+''"
              v-for="subItem in item.children"
              :key="subItem.id"
              @click="saveNavState('/'+subItem.path)"
            >
              <template slot="title">
                <!-- 图标 -->
                <i class="el-icon-menu"></i>
                <!-- 文本 -->
                <span>{{subItem.authName}}</span>
              </template>
            </el-menu-item>
          </el-submenu>
        </el-menu>
      </el-aside>
      <!-- 右侧主体内容 -->
      <el-main>
        <router-view></router-view>
      </el-main>
    </el-container>
  </el-container>
</template>
<script>
export default {
  data() {
    return {
      //列表数据
      MenuList: [],
      //一级菜单字体图标
      iconObj: {
        "125": "el-icon-s-check",
        "103": "el-icon-s-opportunity",
        "101": "el-icon-s-goods",
        "102": "el-icon-s-order",
        "145": "el-icon-s-platform",
      },
      //切换折叠效果的布尔值
      toggle: false,
      //激活状态
      activePath:''
    };
  },
  created() {
    this.getMenuList();
    this.activePath=window.sessionStorage.getItem('activePath')
  },
  methods: {
    //实现退出功能
    logout() {
      window.sessionStorage.clear();
      this.$router.push("/login");
    },
    //获得菜单列表
    async getMenuList() {
      const { data: res } = await this.$http.get("menus");
      // console.log(res);
      if (res.meta.status !== 200) return this.$message.error(res.meta.msg);
      this.MenuList = res.data;
    },
    //实现点击折叠菜单栏
    toggleClick() {
      this.toggle = !this.toggle;
    },
    //保存链接的激活状态
    saveNavState(activePath) {
      window.sessionStorage.setItem("activePath", activePath);
      this.activePath=activePath
    },
  },
};
</script>
<style lang="less" scope>
.home_container {
  width: 100%;
  height: 100%;
}
.el-header {
  background-color: #373d41;
  display: flex;
  justify-content: space-between;
  padding-left: 0;
  align-items: center;
  color: #fff;
  font-size: 20px;
  div {
    display: flex;
    align-items: center;
    margin-left: 15px;
    img {
      margin-left: -35px;
      width: 50px;
    }
  }
}
.el-aside {
  background-color: #333744;
  .el-menu {
    border-right: none;
  }
}
.el-main {
  background-color: #eaedf1;
}
.toggle-button {
  background-color: #4a5064;
  font-size: 10px;
  line-height: 24px;
  color: #fff;
  text-align: center;
  letter-spacing: 0.2em;
  cursor: pointer;
}
</style>